Concrete-road machine



NMA

E. G. CARR CONCRETE RQAD MACHINE Filed may s, 1919 Juy 24,

Patented July 24, 1928.

y, 1,678,624 UNITED STATES PATENT OFFICE.

EDWARD G'. CARR, OF MILWAUKEE, WISCONSIN, ASSIGNOR T0 THE LAKEWOOD EN- GINEERING COMPANY, 0F LAKEWOOD, OHIO, A CORPORATION OF OHIO.

CON CRETE-ROAD MACHINE.

Application filed May 9, 1919. Serial No. 295,948.

This invention relates to concrete road machines and the object of the invention 1s to improve the construction of concrete roadA machines in the manner to be hereinafter described and claimed. 4

Referring to the drawings which accompany this specification and form a part hereof, which drawings illustrate an embodiment of this invention, and on which drawings the same reference characters are used to'designate the same parts wherever they may appear in each of the several views, Fig. 1 is a plan view of al concrete read machine, all parts being omitted which are not necessary to a completel understanding of this invention; Fig. 2 is a front elevation; Fig. 3 is a rear elevation; Fig. 4 is a vertical, longitudinal section on the line 4--4 on Fig. 1, parts being omitted; and Fig. 5 is a verticalsection of details.

Referring to the drawings, the reference numeral 1 designates a frame `which is supported by wheels 2 upon forms or tracks 3 and 4 on each side of the road. The frame supports a motor, not shown, which maybe used to drive one or more of the wheels 2 to propel ,the machine and which may also drive shafts 5 and 6. The shaft 5 has no shaft bearings'and is provided with an eccentric weight 7 which, when the shaft 5 is being rotated, tends to fly away, carrying the shaft 5 with it, under the influence of ccntrifugal force thereby ,moving a tampcr 8 .vertically and a striker 9 horizontally in a manner which is now veryl generally known in connection with my machines which are in use.

The-tamper 8 is secured to springs 10 and 1l and means are provided to vary the effect of the tamping operation of the tamper. In the construction illustrated by the drawings, the springs 10 and 11 are connected by links 12 with bell-crankl levers 1,3 'which I prefer to operate simultaneously. A simple-manner of operating these bellcrank levers siniultaneously from either side of the machine is to connect the bell-crank levers on the same side of the machine by links 14 and 15, extend a shaft 16 across the machine with operating levers 17 and 18 and connect the operating levers with bell-crank levers by means of links 19 and 20.

The springs 1() and 1 1 offer more resistance to the downward pounding caused by the eccentric weight 7 when they are lifted Wea?.

than when they are lowered so that by raising or lowering the springs less violent or more violent blows will be struck by the tamper and a finer adjustment of the violence of the blows can be obtained than by It is especially desirable in this class of machines to provide joints which will not kbecome Vloose and which will have bearing surfaces of ample size to prevent too rapid q I 'effect this result by forming the bearing surfaces as external and internal cones held in contact by springs, a construction which is clearly illustrated by Fig. 5 of the drawings. The reference numeral 21 designates a bearing bracket secured to the frame 1 and provided with an external cone 22. A bell-crank lever 13 is provided with a matching internal cone 23 and is also provided with external cones 24 and 25. The spring spools 26, which are preferably made in two parts for convenience in manufacturing, are provided with external cones 27 and 28, and the links 12 are provided with internal cones 29 and 30 to match the external cones on the bell-crank lever and on the spring spool. The surfaces of these cones afford large bearing and wearing surfaces and the parts are held together by bolts 31, 32 and 33. Springs 34, 35 and v36 are resilient means for holding the cones in contact and proper adj ustmcnt of the cones can readily be obtained by mea-ns of the nuts 37, 38 and 39. Washers 40, 41and 42 may be interposed between the nuts and the springs. The springs 34, 35 and 36 also serve to lock the -nuts on the bolts and prevent them from beingjarred loose.

The reference numeral 43 designates a belt or float or finisher which may be used to float or give a finish to the. road surface. It may be of any construction or material but I prefer a cloth material such as canvas and I prefer to move it back and forth across the road. The drawings illustrate a canvas float secured to a frame 44 which is hinged to the machine so that the float can be turned up out of the way -when the 'ma-\ chine is moved backward or when it is not desired to use the fioat. The hinges permit the pipe 46 to move lengthwise as well as tov rotate and a link 47 is pivoted to the frame I and has a. vertical slot in its lower end through which projects a pin 48 which is secured to the pipe 46 of the frame 44. The slot allows freedom for reciprocating the frame and for turning the frame up. The link 47 is provided with a pin 49 which can be engaged by a'notch 50 in a rod 51. The rod 51 is secured to a crank 52 which is secured to the shaft 6 and, when engaged with the' pin 49, will swing the link 47 andr move the frame 44 and the float or finisher 43 back and forth across the road. As it is not desirable to have the frame 44 and the float or finisher 43 move when the frame and float are turned up, a. lever 53 is pivotedon the link 47 and connected with the 'rod 51 and the pipe 46 of the frame 44 so that the rotation ofthe frame 44 will lift the rod 51 tojsuch an extent that the notch is disengaged from the pin 49. The rod 51 will continue to be reciprocated by the crank 52 but will not swing the link 47 nor move the vframe 44.

What is claimed is:

1. The-combination with a tamper, of motor driven means to actuate the tamper, adjustable resistance means secured to the tamper for varying the effect of the motor driven means upon the tamper, and means for varying the effect of said adjustable resistance means upon the tamper.

2. The combination with a tamper, of

motor driven means to actuate the tamper,

springmechanism secured to the tamper, and means for varying the effect of said spring mechanism upon the tamper.

3. The combination with a tamper, of

- motor driven means to actuate the tamper,

springs secured to the tamper, and adjustable means secured to said springs to act through said springs to support the tamper.

4. The combinationv'with a concrete road ,machine provided with a tamper, of nonrigid means for actuating the tamper, and a fixible float or finisher connected to the machine to finish the surface operated upon by the tamper. y

5. The combination .with a concrete road machine provided with a tamper and means for actuating lthe tamper, of a fiexible float or.- finisher connected to the machine at its front edge above the surface to be finished and with its rear edge adapted to rest upon the surface to be finished, and means for the forward movement of the machine.

Lavaca;

6. The combinationv with a concrete road for actuating the tamper, of a iiexible float or finisher connected to the machine atr its machine provided with 'a tamper and means cuil front edge\above and out of contact with.

the surface to be finished and having a part.

adapted to rest upon the surface to be connected with said frame, said link being, l

provided with a pin, a rod providedl with a notch adapted to engage said pin, means for reciprocating said rod, and means controlled by said frame for disengaging said rod from said pin when the frame is turned up.

8. In a road-tamping machine, thecombination with a frame, of a float mounted thereon, means for moving said float transversely of the road, controlling means for said moving means, and means operable with aid controlling means, to raise or lower the oat.

.9. In a road-tamping machine, the combination with a frame, of a float mounted at one end thereof and reciprocating horizontally, a strike-off mounted at the other end of the frame and reciprocating horizontally, a tamper' located in the central portion of the machine and reciprocating vertically thereof, and means. for actuating said fioat,

.strike-off and tamper including an engine centrally located in the frame. 10. In a road-tamping machine, the combination, with 'a frame, of a float mounted thereon, means for moving said fioat transversely of the road, a clutch for controlling said moving means, and means for raising and lowering the float including a partop-` eratively connected to said clutch whereby said clutch is thrown in when the fioat is lowered and raised.

11. In a device of the class described, a portable frame, vand means for propelling the-same; and a belt supported at its ends byl'said frame so as tohave engagement with the surface of a piece of plastic cement work over which said frame travels.

-ed toglie moved in a longitudinal direction thrown out wheln the float is V along a road, of a flexible belt supported thereby, and means for moving said belt transversely of a road while in contact with the surface of a road.

In witness whereof I'hereto affix my signature.

c EDWARD G. CARR. 

